import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 周斌
 * Date: 2023-11-20
 * Time: 22:54
 */
public class Test {
    //转换成小写字母
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str2 = scanner.nextLine();
        String ret2 = str2.toLowerCase();
        System.out.println(ret2);
    }
    //符串中的单词数
    public static void main1(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str1 = scanner.nextLine();
        String[] ret1 = str1.split(" ");
        System.out.println(ret1.length);
    }
}